Home / 21,390.35-29,518.86-11,829.74

Finding the Fourth Proportional to 21,390.35, 29,518.86 and 11,829.74

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Solution

The fourth proportional to 21,390.35, 29,518.86 and 11,829.74 is: 16,325.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.35 : 29,518.86 = 11,829.74 : x
  2. Step 2: Convert to fraction form
    21,390.35/29,518.86 = 11,829.74/x
  3. Step 3: Cross multiply
    21,390.35x = 29,518.86 × 11,829.74
  4. Step 4: Simplify right side
    21,390.35x = 349,200,291.30
  5. Step 5: Solve for x
    x = 349,200,291.30/21,390.35
  6. Step 6: Final answer
    x = 16,325.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.